View of the Sheep Mountain Tunnel mill (also know as the Lost Horse Mill, Dead Horse Mill, and Crystal Mill) in Crystal (Gunnison County), Colorado. The log building is perched on a crag over the Crystal River. It includes a wooden structure built...

View of the Crystal Mill powerhouse built in 1893, on Crystal River; shows the wooden dam with raised water level and the wooden shaft that turns the waterwheel; rooftops of the wood frame structures of Crystal City, Colorado in the distance.

View of the Sheep Mountain Mill, a powerhouse building near Crystal (Crystal City), Gunnison County, Colorado; features a log building with a vestibule sitting on a rocky precipice over a rushing stream; rickety walkway along side of the building...

View of Crystal (Crystal City), Gunnison County, Colorado; includes gable-roof wooden buildings, including the Crystal Club (a men's club during the mining town's heyday) in a grassy area strewn with rocks and few aspen trees; aspen and pines trees...

View of the east wall of the log Crystal Mill powerhouse, (built in 1893) on Crystal River, Gunnison County, Colorado; shows the stamp mill and the adjacent water flume running beneath the shaft housing where the water dropped onto the water wheel.

View of Crystal River with distant view of Chair Mountain (elevation 12,721 feet) near Marble, Colorado; Crystal River and San Juan Railway standard gauge track and telegraph wire and poles parallel the Crystal River and canyon.

A man stands near the North Fork of Rock Creek and watches the waterfall below the abandoned mill in Crystal (also known as Crystal City), Gunnison County, Colorado. A small log building with a gable is atop a rock and is connected to a decaying...

View of Crystal River in Colorado; shows canyon, Crystal River Railroad standard gauge track and dirt road on opposite river banks, and former Aspen and Western Railroad grading above Crystal River Railroad grade.

Railroads--Grades--Colorado--1890-1920.; Crystal River (Colo.); Aspen and Western Railway Company.; Crystal River Railway Company.

View of the Crystal Grill at 2631 Larimer Street in the Five Points neighborhood of Denver, Colorado. Shows a single-story storefront addition to a private residence. The twentieth-century brick addition has three small windows with brick sills, a...

View of the the Sheep Mountain Mill powerhouse building near Crystal (Crystal City), Gunnison County, Colorado; includes a log building with a vestibule, a rustic ladder extending from the building down to the water, and an adjacent falling-apart...

Aerial view of Roaring Fork River & valley from Red Mountain near Carbondale, Colorado reached via Colorado Midland Railway; Crystal River just about to join up with Roaring Fork River but actual junction is out of view, center right; wooden bridge...

View of the entrance to Crystal Spring in Allenspark (Boulder County), Colorado. The entrance is a covered lean-to style entrance structure. A lean-to style spring house is in the distance. A carved wooden sign on the building reads: "Crystal...

Distant view of Chair Mountain (elevation 12,721 feet); Crystal River and Crystal River and San Juan Railway standard gauge track are in foreground near Marble, Colorado; also shows distant railroad bridge, canyon, and telegraph poles and wires.

The Colorado-Yule Marble Company's finishing mill in Marble (Gunnison County), Colorado under construction for Mill B; lumber and company houses are nearby. Freight cars are on the tracks of the Crystal River & San Juan Railroad near the Crystal...

View of Sheep Mountain Mill, a powerhouse building near Crystal (Crystal City), Gunnison County, Colorado; includes part of the building, a log gable roofed structure with a vestibule, and a a rustic ladder extending from the building down to the...

View of the entrance to Crystal River Ranch located near Carbondale, Colorado, with an entry sign reading "Crystal River Ranch." Beyond the wooden gate and metal cattle guard, is a white two-story clapboard house surrounded by large trees and...

View of Sheep Mountain Mill, a powerhouse building near Crystal (Crystal City), Gunnison County, Colorado; shows a section of the mill where roofs and walls have fallen in; building sitting on a precipice over a rushing stream, and parts of the...

View taken at base of ascending pathway in Crystal Glen, at Green Mountain Falls northwest of Manitou, Colorado, served by Colorado Midland Railway; wooden pathway crosses stream with small waterfall and boulders.

View of signs and a wooden pole tepee near Sitting Bull Crystal Cave, Rapid City, South Dakota. Signs (one arrow shaped), depict a Sioux shield and the profile of a Native American man, and read: "Sitting Bull Crystal Cave and Sioux Indian Pageant...

View of Crystal (Crystal City), Gunnison County, Colorado; includes 1930s or 1940s automobile, gable-roofed log house with a wood canopy over the door, and mountain, with aspen, evergreens, and bare rocky areas looming over the valley.

View of large snowbridge across the north fork of the Crystal River about nine miles east of Marble (Gunnison County), Colorado; shows small canyon with cascading stream and mountain ridge in background. About 1/2 mile upstream is the waterfall...

View of cascading stream, narrow canyon, and waterfall nicknamed "Devil's Punch Bowl" about nine and a half miles east of Marble (Gunnison County), Colorado. About three and a half miles upstream from the "Devil's Punch Bowl" is the headwaters of...

View of the Crystal River & San Juan Railroad on the grounds of the marble mill site, in Marble (Gunnison County), Colorado. The locomotive is #6. The railroad and tracks are between the mill site buildings and the Crystal River. To the left of the...

View of Crystal (Crystal City), Gunnison County, Colorado; shows an abandoned gable-roof log construction building with a smaller log building in a row of tall trees; two track road runs in front with pine and aspen-covered mountain in the...

View of an abandoned log house in Crystal (Crystal City), Gunnison County, Colorado; includes a log fence, a man walking across a grassy area towards the house, aspen trees growing behind the building, and pine trees on the rocky mountain in the...